Climatic Droughts Zoning Using Inverse Distance Weighted Method

Drought is one of the inevitable climatically and harmful characteristics of Iran, Therefore the research and study of this phenomenon will be very necessary. The process of obtaining maps of the climatic zones for all of the localities in the Esfahan of Iran. For the generation of the climatic records such as rainfall periods and intensity, provided by the 10 climatology stations for a total of 30 years data from (1980-2010), was used as a source of information. These data was then subjected to a statistical analysis, using SPI method for the calculation of the frequency, intensity and duration of drought process. Finally for the mapping drought zoning in all localities of the West of Esfahan for the long term period, the Inverse Distance Weighted Method (IDW) was used in the Arc GIS software media. The results of evaluations indicated more improvement of drought continuous in comparison to drought surface in this area and ecosystem of this region affected by this drought criteria that appeared from local climate.